Fix description how to create conversion function.
Fix description how to create conversion function.

ashwinstar/gpdb,ahachete/gpdb,Postgres-XL/Postgres-XL,pavanvd/postgres-xl,Quikling/gpdb,xuegang/gpdb,cjcjameson/gpdb,adam8157/gpdb,CraigHarris/gpdb,Quikling/gpdb,jmcatamney/gpdb,kaknikhil/gpdb,lisakowen/gpdb,ashwinstar/gpdb,rvs/gpdb,lisakowen/gpdb,adam8157/gpdb,Postgres-XL/Postgres-XL,ashwinstar/gpdb,cjcjameson/gpdb,yuanzhao/gpdb,lisakowen/gpdb,snaga/postgres-xl,greenplum-db/gpdb,edespino/gpdb,chrishajas/gpdb,royc1/gpdb,yazun/postgres-xl,rvs/gpdb,jmcatamney/gpdb,CraigHarris/gpdb,ahachete/gpdb,yazun/postgres-xl,oberstet/postgres-xl,yazun/postgres-xl,edespino/gpdb,CraigHarris/gpdb,edespino/gpdb,pavanvd/postgres-xl,royc1/gpdb,postmind-net/postgres-xl,zaksoup/gpdb,xuegang/gpdb,pavanvd/postgres-xl,Quikling/gpdb,janebeckman/gpdb,pavanvd/postgres-xl,rvs/gpdb,tpostgres-projects/tPostgres,lintzc/gpdb,Quikling/gpdb,lintzc/gpdb,arcivanov/postgres-xl,arcivanov/postgres-xl,cjcjameson/gpdb,chrishajas/gpdb,janebeckman/gpdb,greenplum-db/gpdb,lisakowen/gpdb,xinzweb/gpdb,50wu/gpdb,arcivanov/postgres-xl,jmcatamney/gpdb,lisakowen/gpdb,zaksoup/gpdb,zaksoup/gpdb,xuegang/gpdb,edespino/gpdb,yuanzhao/gpdb,lintzc/gpdb,50wu/gpdb,zaksoup/gpdb,edespino/gpdb,ashwinstar/gpdb,tpostgres-projects/tPostgres,xuegang/gpdb,adam8157/gpdb,adam8157/gpdb,royc1/gpdb,edespino/gpdb,yuanzhao/gpdb,Quikling/gpdb,postmind-net/postgres-xl,Chibin/gpdb,techdragon/Postgres-XL,xinzweb/gpdb,jmcatamney/gpdb,adam8157/gpdb,yuanzhao/gpdb,ovr/postgres-xl,zeroae/postgres-xl,CraigHarris/gpdb,yuanzhao/gpdb,kaknikhil/gpdb,tpostgres-projects/tPostgres,rvs/gpdb,snaga/postgres-xl,rvs/gpdb,edespino/gpdb,lintzc/gpdb,rvs/gpdb,zaksoup/gpdb,kaknikhil/gpdb,oberstet/postgres-xl,0x0FFF/gpdb,rvs/gpdb,0x0FFF/gpdb,ashwinstar/gpdb,cjcjameson/gpdb,CraigHarris/gpdb,janebeckman/gpdb,janebeckman/gpdb,yazun/postgres-xl,50wu/gpdb,chrishajas/gpdb,greenplum-db/gpdb,yazun/postgres-xl,edespino/gpdb,greenplum-db/gpdb,rvs/gpdb,ahachete/gpdb,kaknikhil/gpdb,kaknikhil/gpdb,zeroae/postgres-xl,kaknikhil/gpdb,xuegang/gpdb,xuegang/gpdb,kmjungersen/PostgresXL,ovr/postgres-xl,janebeckman/gpdb,greenplum-db/gpdb,cjcjameson/gpdb,pavanvd/postgres-xl,lintzc/gpdb,rvs/gpdb,Chibin/gpdb,oberstet/postgres-xl,postmind-net/postgres-xl,xuegang/gpdb,lisakowen/gpdb,janebeckman/gpdb,postmind-net/postgres-xl,cjcjameson/gpdb,royc1/gpdb,ovr/postgres-xl,oberstet/postgres-xl,arcivanov/postgres-xl,chrishajas/gpdb,techdragon/Postgres-XL,lintzc/gpdb,janebeckman/gpdb,Postgres-XL/Postgres-XL,rvs/gpdb,kmjungersen/PostgresXL,xinzweb/gpdb,xinzweb/gpdb,cjcjameson/gpdb,chrishajas/gpdb,yuanzhao/gpdb,Chibin/gpdb,ashwinstar/gpdb,arcivanov/postgres-xl,tpostgres-projects/tPostgres,techdragon/Postgres-XL,janebeckman/gpdb,snaga/postgres-xl,yuanzhao/gpdb,janebeckman/gpdb,50wu/gpdb,ahachete/gpdb,jmcatamney/gpdb,0x0FFF/gpdb,50wu/gpdb,snaga/postgres-xl,Chibin/gpdb,yuanzhao/gpdb,Chibin/gpdb,Chibin/gpdb,kmjungersen/PostgresXL,lisakowen/gpdb,yuanzhao/gpdb,greenplum-db/gpdb,greenplum-db/gpdb,Chibin/gpdb,zaksoup/gpdb,chrishajas/gpdb,zeroae/postgres-xl,snaga/postgres-xl,kmjungersen/PostgresXL,jmcatamney/gpdb,cjcjameson/gpdb,chrishajas/gpdb,ovr/postgres-xl,Quikling/gpdb,royc1/gpdb,xinzweb/gpdb,50wu/gpdb,arcivanov/postgres-xl,zeroae/postgres-xl,chrishajas/gpdb,adam8157/gpdb,adam8157/gpdb,0x0FFF/gpdb,xinzweb/gpdb,lintzc/gpdb,zaksoup/gpdb,janebeckman/gpdb,Quikling/gpdb,Quikling/gpdb,Chibin/gpdb,0x0FFF/gpdb,kmjungersen/PostgresXL,50wu/gpdb,zeroae/postgres-xl,royc1/gpdb,kaknikhil/gpdb,ahachete/gpdb,cjcjameson/gpdb,Postgres-XL/Postgres-XL,xuegang/gpdb,Quikling/gpdb,xinzweb/gpdb,royc1/gpdb,50wu/gpdb,kaknikhil/gpdb,CraigHarris/gpdb,royc1/gpdb,techdragon/Postgres-XL,CraigHarris/gpdb,lintzc/gpdb,Postgres-XL/Postgres-XL,edespino/gpdb,Quikling/gpdb,ahachete/gpdb,kaknikhil/gpdb,postmind-net/postgres-xl,zaksoup/gpdb,0x0FFF/gpdb,lintzc/gpdb,adam8157/gpdb,CraigHarris/gpdb,greenplum-db/gpdb,ahachete/gpdb,ashwinstar/gpdb,ahachete/gpdb,CraigHarris/gpdb,xuegang/gpdb,techdragon/Postgres-XL,cjcjameson/gpdb,kaknikhil/gpdb,edespino/gpdb,ashwinstar/gpdb,jmcatamney/gpdb,oberstet/postgres-xl,Chibin/gpdb,yuanzhao/gpdb,lisakowen/gpdb,xinzweb/gpdb,0x0FFF/gpdb,0x0FFF/gpdb,jmcatamney/gpdb,Chibin/gpdb,tpostgres-projects/tPostgres,ovr/postgres-xl